QUESTIONS ON TCP/IP

QUESTIONS ON TCP/IP

1. Explain range of TCP/IP classes
Answer :
CLASS A = 1 to 126
CLASS B = 128 to 191
CLASS C = 192 to 223
CLASS D = 224 to 239 (Multicasting)
CLASS E = 240 to 255 (Research)

2. What are Pvt. IP address ?
Answer : Pvt. IP are IPs which are not used in Internet or which are not routable in
Internet. They are also called as non-routable IP's.


3. What are the range of Pvt. IP. ?
Answer :
Class A = 10.0.0.0 to 10.255.255.255
Class B = 172.16.0.0 to 172.31.255.255
Class C = 192.168.0.0. to 192.168.255.255


4. What is function of Router ?
Answer : Router is a device or PC which is used to connect two or more IP networks.


5. What is Default Gateway :
Answer : Default gateway is the address of router.


6. What is Subnet Mask ?
Answer : Subnet mask is used to differentiate Network ID and Host ID from a given IP
address. The default subnet mask are as under
Class A = 255.0.0.0
Class B = 255.255.0.0
Class C = 255.255.255.0



7. What is Loopback address ?
Answer : The loopback address is 127.0.0.1. This address is used to check local TCP/IP
suite or local machine.


8. What protocol is used by PING ?
Answer : Ping uses ICMP(Internet Control Management Protocol)


9. What is used of Tracert ?
Answer : Tracert is a to find path information between source and desitnation. It show no.of hops between source and desitination. Tracert also uses ICMP protocol.



10. Difference between NetBEUI and TCP/IP
Answer :
TCP/IP NetBEUI
a. industry standard Microsoft propertiery
b. IP address NO addressing
c. supports routing Non routable
d. Large network small network
e. more confiugration no configuration



11. What is full form of PING ?
Answer : Packet Internet Network Gopher


BASICS OF NETWORKING
1. Difference between Switch and Hub
Switch HUB
a. Works at layer 2(Switch)
a.works at layer 1(HUB)
b. Uses MAC address for packet forwarding(Switch)
b. uses broadcast for packet forwarding(HUB)
c. Does not required CSMA/CD (Switch)
c.requires CSMA/CD(HUB)
d. Faster than HUB (Switch)
d.Slower than Switch(HUB)
e. Full-duplex (Switch)
e.Half-duplex(HUB)
f. high throughput (Switch)
f.low throughput(HUB)


2. Explain AT&T color code for straight cable and cross cable
Answer :
Orange/white
orange
green/white
blue
blue/white
green
brown/white
brown


3. what is bandwidth of of CAT5 cable
Answer : 100 Mbps


4. What is the recommanded CAT5 cable length between switch and PC ?
Answer : 100 meters


5. When to use cross cable and straight cable
Answer :
Similar device = cross cable
eg. switch to switch
PC to PC
Hub to HUB
Switch to HUB
PC to router
router to router

Unsimilar device = straight cable
eg. PC to switch
PC to HUB
Router to Switch


6. Which pins are used in CAT5 cables
Answer : pin no. 1,2,3,6
pin 1 = tx +
pin 2 = tx -
pin 3 = rx +
pin 6 = rx -


7. difference between domain and workgroup
Answer :
a. centralized network model (domain)
a.decentralized network(workgroup)
b. Domain is controlled by DC (domain)
b.No centrailzed control(workgroup)
c. Centralised login (domain)
c.Local login(workgroup)
d. centrailsed user database (domain)
d.local user databased(workgroup)
e. Easy and centrailsed management (domain)
e.NA(workgroup)
f. good for large network (domain)
f.good for small network(workgroup)


8. Different types of LAN topologies
Answer :
a. Bus topology = 10base2 (Thinnet)
= 10base5 (Thicknet)
b. Star topology = 10baseT (ethernet, 10 mbps)
= 100baseTx (fastethernet, 100 mbps)
= 100baseFX (fastethernet with Fibre)
= 1000baseTX (gigabit ethernet, 1000 mbps)
= 1000basefx (gigabit ethernet with fibre)
c. WAN toplogies = PSTN (Public switched telephone network)
= ISDN (Integrated switched digital network)
= Frame Relay
= Leased Line
= DSL (Digital subscriber line)
= ATM (Async Transfer Mode)



9. Explain in short about all 7 layers of OSI
Answer :
Application layer = user interface and application
Presentation layer = Data conversion and transformation
session layer = keep data of diff. application seperately
transport layer = end to end connectivity using port numbers.
network layer = logical addressing like IP address.
Data link layer = Physical addressing like MAC address.
Physical layer = Physical transmission of data using 0's and 1's.